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 Post subject: Crankshaft assemblies arrived
PostPosted: Sun Apr 29, 2018 2:55 pm 
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Joined: Wed Sep 13, 2017 7:35 pm
Posts: 69
Cranks arrived Friday, gonna do some measuring and plug in all the shipping then on to the site


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Mon Apr 30, 2018 12:32 pm 
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Joined: Mon Feb 25, 2008 11:44 am
Posts: 346
Location: Northern Ireland
Hi Gus
I had been trying to contact you by pm etc with no success. I was trying to find out if you're going to get any NS400 cranks made??
thanks


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Mon Apr 30, 2018 1:57 pm 
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Joined: Wed Sep 13, 2017 7:35 pm
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I have tried many peeps to get one and that was a no go, I am interested in that! I'll have piston kits soon and an RD 400 crank. I have to have a good sample to start with.


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 7:43 am 
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Joined: Sun Oct 28, 2012 6:38 pm
Posts: 794
Location: Spielberg, Austria
I have a damaged disassembled NS400R crankshaft at home.
Center conrod big end bearing failed, other parts are OK.
=> Center crank pin is pressed in on both sides, a very simple part.

Should be fine to get measurements to reproduce it.

PM if you are interested.

_________________
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 11:16 am 
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Joined: Wed Sep 13, 2017 7:35 pm
Posts: 69
Is it the rods that are nla?


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 11:21 am 
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If all the pins are removable unlike the rz/Rd it would be a simple rebuild kit, I'm gonna try and do all nla main parts for the cool 2-strokers


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 12:54 pm 
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Joined: Sun Oct 28, 2012 6:38 pm
Posts: 794
Location: Spielberg, Austria
Most of the NS400R engine parts are NLA including pistons, conrods and crankshaft + crankshaft bearings + seals.

Not all pins are removable, only the center pin
The outer crank pin`s are integrated into the inner webs.
All in all you need 4 different tools for webs (maybe 3 as you can use the same raw part for the 2 outer webs, just different machining)

You can`t do a simle repair kit as the parts are also worn out where the main bearings are sitting.
Don`t know what happens there, I think they are simply too soft.
60000km and they are dead.

Image

Image

_________________
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 1:57 pm 
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Joined: Wed Sep 13, 2017 7:35 pm
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I'll check with a buddy to see what he has for parts, Au to USA is expensive shipping


So no one makes a rod kit or sells main bearings


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 Post subject: Re: Crankshaft assemblies arrived
PostPosted: Tue May 01, 2018 4:21 pm 
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Joined: Sun Oct 28, 2012 6:38 pm
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Location: Spielberg, Austria
http://www.classicracereplicas.com

Main bearings are Koyo, I can check if I can get them.
No aftermarket conrods available as far as I know.
I also did not find standard spec pistons.

Bike has coated cylinders instead of steel sleeves.
Would be nice to have aftermarket crankshafts with new rods and a piston kit.
Then you can coat your cylinders if they are out of spec and run it again with standard bore.

This is exactly what I would need to rebuild the original engine of my 400.

_________________
My bikes:
RD500 YPVS 1GE
RD350 YPVS 31K 1985
Honda CBR 1000 RR SC57
Yamaha R1 RN04


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